Introduction and Background Information

Bretthauer, Erich W.; Kraus, Heinrich; Domenico, Alessandro Di

doi:10.1007/978-1-4615-3308-5_1

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Chlorinated derivatives have been praised for their usefulness (as drugs, pesticides, monomers for plastics, or as inert nonflammable solvents) or blamed for their toxicity (asphyxiating, vesicant, or lachrymatory gases) − . However, in the past half-century, some categories of chlorinated compounds have earned the despicable reputation of being the worst contaminants ever; one such category is generically known as “polychlorinated-dibenzo- p -dioxins” − , which have proved to be highly toxic, carcinogenic, teratogenic, and mutagenic chemicals, posed as a threat to both the environment and human health − .…”

Section: Introductionmentioning

confidence: 99%

Metallic Ca−Rh/C-Methanol, A High-Performing System for the Hydrodechlorination/Ring Reduction of Mono- And Poly Chlorinated Aromatic Substrates

Mitoma

Kakeda

Simion

et al. 2009

Environ. Sci. Technol.

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We investigated the reduction of some substituted mono- and poly chlorobenzenes bearing functional groups such as methyl, methoxy, hydroxyl, and amino, under mild conditions (80 degrees C and magnetic stirring, for 2 h) using a system consisting of metallic calcium and methanol (as hydrogen donor system) and 5% wt. Rh/C (as hydrodechlorination/ring reduction catalyst). Hydrodechlorination easily took place for methoxy- and alkyl-chlorobenzenes, yielding the corresponding hydrodechlorinated compounds (57-76%) and affording as secondary reaction products the ring-reduced compounds (16-43%). Treatment of hydroxy- and amino-chlorobenzenes under the same conditions, respectively, gave corresponding hydrodechlorinated compounds (over 60%) along with the ring-reduced compounds. Results show that the reaction of substituted polychlorinated benzenes needs a longer reaction time (6 h), the transformation being nevertheless complete.

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